<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <style>
    .con {
      width: 300px;
      height: 100px;
      border: 1px solid red;
      background-color: #bfa;
      opacity: 0.07;
    }
    .item {
      color: green;
    }
  </style>
  <style></style>
  <body>
    <div class="con">
      <div class="item">1111</div>
    </div>
  </body>
</html>
